Chusetts



(No Model) 3 Sheets-Sheet l.

E. & P. W. HEYMANN.

ELECTRIC ARC LAMP. No. 443,633. Patented D c. 30, 1890.

(No Model.) 3 She tsSheet 2. E. 85 F. W. HEYMANN.

ELECTRIC ARC LAMP. No. 443,633. Patented Dec. 80, 1890.

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(No Model.)

3 Sheets-Sheet 3. E. & F. W. HEYMANN.

ELECTRIC ARC LAMP.

Patented Dec. 30, 1890.

\Y ih 55555.

. UNITED STATES PATENT OFFICE.

EDWARD I-IEYMANN AND FRANK \VM. HEYMANN, OF BOSTON, MASSA- CHUSETTS.

ELECTRIC-ARC LAM P.

SPECIFICATION forming part of Letters Patent No. 443,633, dated December 30, 1890.

Application filed November 5, 1888. Serial No. 290,004. (No model.)

To aZZ whom it may concern.-

Be it known that we. EDWARD HEYMANN and FRANK WILLIAM HEYMANN, of Boston, in the county of Suffolk and State of Massachusetts, have invented an Improved Regulator for Are Lamps, of which the following is a specification, reference being had -to the accompanying drawings, in Wl1lGh Figures 1 and 2 are elevations of a lamp embodying ourinvention. Fig. 3 is a plan of the same, partlyin section, on line 3 3 of Fig. 1. Fig. 4C is a sectional view on line 4 4 of Fig. 3, looking to the left. Fig. 5 is a sectional view on line 5 5 of Fig. 6; and Fig. 6 is a view, partly in section, on line 6 6 of Fig. 1, looking to the left.

In our application, Serial No. 290,003, filed November 5, 1888, we have described a regulator for are lamps whose novelty is that the feed-rod is controlled directly by the magnetic field of an electro-magnet, and our present invention is a regulator of that class, but differs from that invention by reason of the fact that in our present invention the feedrod is not of magnetic material, but is acted upon mechanically by the electro-magnets.

In the drawings, A is the feed-rod, preferably a brass tube, as usual, which extends between the pole pieces I) d, which are grooved to receive it. These pole-pieces b d are in all respects like the pole-pieces Z) d,

' except that the latter are not grooved; but

in case of a lamp with two feed-rods the poles b (1 will be grooved to receive the second rod, which will of course be prevented from I feeding until after the first carbon is used up, as will be clear to all skilled in the art without description. The surfaces of the poles b d are eccentric, in order to give a rocking motion to the cores B D, and in practice the surfaces of the polesb d at each edge of the grooved portions are also eccentric, in order that these poles b (I may re-enforce the poles b d.

The cores B D are wound with main windings b d and shunt-windings b (1 so that when the positive and negative carbons are in contact the magnetic energy of the poles 1) cl and b cl is at the maximum as soon as the current passes.

The cores B and D are first pulled together by magnetic attraction until the feed-rod A is gripped between the poles b d, and the cores B and D then rock, owing to the eccentricity of the opposed surfaces of the poles b cl and of those parts of the surfaces of the poles b d, which are at the sides of the grooves, thereby lifting feed-rod A and establishing the are. As the positive carbon burns away the magnetic energy is decreased and the weight of the feed-rod and its attachment gradually rocks the cores in the opposite direction, thus regulating the arc, and after the arc is thus established and regulated the further consumption of the positive carbon gradually weakens the energy of the magnets, as will be fully understood by all skilled in the art, until the poles b d relax their grasp on feed-rod A sufficiently to allow it to slip between them. In case feedrod A should slip too far, thus making the are too short, the feed-rod is instantly picked up, the feed and the length of the are being thus regulated by the n'iagnets acting directly upon the feed-rod.

The details of construction and the electric connections will be fully understood without description.

We are aware of \Villsons patent, No. 332,178, dated December 8, 1885; Areys patent, No. 253,826, dated February 14, 1882; Balls patent, No. 2i9,872, dated November 22,1881, and Teslas patent, No. 385,786, dated February 9, 1886, and disclaim all that is shown in them.

lVh-at we claim as our invention is- The improved regulator for are lamps above described, consisting of two electromagnets whose energy is controlled by shuntand main currents, the cores being mounted axially crosswise of the feed-rod, the polepieces of the cores forming rocker-arms and the feed-rods being gripped directly between two opposed pole-pieces, substantially as and for the purpose set forth.

EDIVARD HEYMANN. FRANK IVM. HEYMANN. Witnesses:

J. E. llIAYNADIER, JOHN R. Snow. 

